<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图 -->
		<el-card>
			<!-- 提示区域 -->
			<el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
			<!-- 步骤条区域 -->
			<el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>

			<!-- tab栏区域 -->

			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
				<el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name"><el-input v-model="addForm.goods_name"></el-input></el-form-item>
						<el-form-item label="商品价格" prop="goods_price"><el-input v-model="addForm.goods_price" type="number"></el-input></el-form-item>
						<el-form-item label="商品重量" prop="goods_weight"><el-input v-model="addForm.goods_weight" type="number"></el-input></el-form-item>
						<el-form-item label="商品数量" prop="goods_number"><el-input v-model="addForm.goods_number" type="number"></el-input></el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader expand-trigger="hover" :options="catelist" :props="cateProps" v-model="addForm.goods_cat" @change="handleChange"></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<!-- 渲染表单的Item项 -->
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							<!-- 复选框组 -->
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id"><el-input v-model="item.attr_vals"></el-input></el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">商品图片</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">商品内容</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
	</div>
</template>

<script>
export default {
	data() {
		return {
			activeIndex: '0',
			// 添加商品
			addForm: {
				goods_name: '',
				goods_price: 0,
				goods_weight: 0,
				goods_number: 0,
				// 商品所属的分类数组
				goods_cat: []
			},
			addFormRules: {
				goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
				goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
				goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
				goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
				goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
			},
			// 商品分类列表
			catelist: [],
			cateProps: {
				label: 'cat_name',
				value: 'cat_id',
				children: 'children'
			},
			// 动态参数列表数据
			manyTableData: [],
			// 静态属性列表数据
			onlyTableData: []
		};
	},
	created() {
		this.getCateList();
	},
	methods: {
		// 获取所有商品分类数据
		async getCateList() {
			const { data: res } = await this.$http.get('categories');

			if (res.meta.status !== 200) {
				return this.$message.error('获取商品分类数据失败！');
			}

			this.catelist = res.data;
			console.log(this.catelist);
		},
		handleChange() {
			console.log(this.addForm.goods_cat);
			if (this.addForm.goods_cat.length !== 3) {
				this.addForm.goods_cat = [];
			}
		},
		beforeTabLeave(activeName, oldActiveName) {
			if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
				this.$message.error('请先选择商品分类！');
				return false;
			}
		},
		async tabClicked() {
			if (this.activeIndex === '1') {
				const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
					params: { sel: 'many' }
				});

				if (res.meta.status !== 200) {
					return this.$message.error('获取动态参数列表失败！');
				}

				console.log(res.data);
				res.data.forEach(item => {
					item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ');
				});
				this.manyTableData = res.data;
			} else if (this.activeIndex === '2') {
				const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
					params: { sel: 'only' }
				});

				if (res.meta.status !== 200) {
					return this.$message.error('获取静态属性失败！');
				}

				console.log(res.data);
				this.onlyTableData = res.data;
			}
		}
	},
	computed: {
		cateId() {
			if (this.addForm.goods_cat.length === 3) {
				return this.addForm.goods_cat[2];
			}
			return null;
		}
	}
};
</script>

<style lang="scss" scoped>
.el-checkbox {
	margin: 0 10px 0 0 !important;
}
</style>
